build(deps): bump pyqt5 from 5.15.7 to 5.15.9 (#166)

Bumps [pyqt5](https://www.riverbankcomputing.com/software/pyqt/) from 5.15.7 to 5.15.9.

---
updated-dependencies:
- dependency-name: pyqt5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -2,6 +2,6 @@
 # note: 日后有需求可以改写成 基于pip-compile-multi 来管理依赖，可以在手动维护各个环境的直接依赖的基础上，同时自动生成对应环境的所有间接依赖的固定版本列表，确保可重现
 -r requirements_z_base.txt
 
-PyQt5==5.15.7
+PyQt5==5.15.9
 PyQt5-stubs==5.15.6.0
 pywin32==305